RUSTED HUB NUT

Nissan Maxima

I am trying to install halfshafts on a 1995 nissan maxima with 208000 miles. The problem is the r/s hub nut will not break loose I have tried penetrating oil, heating the nut, impact wrenches & a cheater bar. It still won't budge. Do you have any suggestions. AS far as I know the nut has never been off. Thanks!